///*
// * @(#)XMLUtils.java	1.6 05/11/17
// *
// * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
// * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
// */
//
//package cn.jc.util;
//
//import java.io.IOException;
//import java.io.InputStream;
//import java.io.OutputStream;
//import java.io.StringReader;
//import java.util.InvalidPropertiesFormatException;
//import java.util.Iterator;
//import java.util.Set;
//
//import javax.xml.parsers.DocumentBuilder;
//import javax.xml.parsers.DocumentBuilderFactory;
//import javax.xml.parsers.ParserConfigurationException;
//import javax.xml.transform.OutputKeys;
//import javax.xml.transform.Transformer;
//import javax.xml.transform.TransformerConfigurationException;
//import javax.xml.transform.TransformerException;
//import javax.xml.transform.TransformerFactory;
//import javax.xml.transform.dom.DOMSource;
//import javax.xml.transform.stream.StreamResult;
//
//import org.w3c.dom.Document;
//import org.w3c.dom.Element;
//import org.w3c.dom.Node;
//import org.w3c.dom.NodeList;
//import org.xml.sax.EntityResolver;
//import org.xml.sax.ErrorHandler;
//import org.xml.sax.InputSource;
//import org.xml.sax.SAXException;
//import org.xml.sax.SAXParseException;
//
///**
// * A class used to aid in Properties load and save in XML. Keeping this
// * code outside of Properties helps reduce the number of classes loaded
// * when Properties is loaded.
// *
// * @version 1.9, 01/23/03
// * @author  Michael McCloskey
// * @since   1.3
// */
//class XMLUtils {
//
//    // XML loading and saving methods for Properties
//
//    // The required DTD URI for exported properties
//    private static final String PROPS_DTD_URI =
//    "http://java.sun.com/dtd/properties.dtd";
//
//    private static final String PROPS_DTD =
//    "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
//    "<!-- DTD for properties -->"                +
//    "<!ELEMENT properties ( comment?, entry* ) >"+
//    "<!ATTLIST properties"                       +
//        " version CDATA #FIXED \"1.0\">"         +
//    "<!ELEMENT comment (#PCDATA) >"              +
//    "<!ELEMENT entry (#PCDATA) >"                +
//    "<!ATTLIST entry "                           +
//        " key CDATA #REQUIRED>";
//
//    /**
//     * Version number for the format of exported properties files.
//     */
//    private static final String EXTERNAL_XML_VERSION = "1.0";
//
//    static void load(Properties props, InputStream in)
//        throws IOException, InvalidPropertiesFormatException
//    {
//        Document doc = null;
//        try {
//            doc = getLoadingDoc(in);
//        } catch (SAXException saxe) {
//            throw new InvalidPropertiesFormatException(saxe);
//        }
//        Element propertiesElement = (Element)doc.getChildNodes().item(1);
//        String xmlVersion = propertiesElement.getAttribute("version");
//        if (xmlVersion.compareTo(EXTERNAL_XML_VERSION) > 0)
//            throw new InvalidPropertiesFormatException(
//                "Exported Properties file format version " + xmlVersion +
//                " is not supported. This java installation can read" +
//                " versions " + EXTERNAL_XML_VERSION + " or older. You" +
//                " may need to install a newer version of JDK.");
//        importProperties(props, propertiesElement);
//    }
//
//    static Document getLoadingDoc(InputStream in)
//        throws SAXException, IOException
//    {
//	DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
//	dbf.setIgnoringElementContentWhitespace(true);
//	dbf.setValidating(true);
//        dbf.setCoalescing(true);
//        dbf.setIgnoringComments(true);
//	try {
//	    DocumentBuilder db = dbf.newDocumentBuilder();
//	    db.setEntityResolver(new Resolver());
//	    db.setErrorHandler(new EH());
//            InputSource is = new InputSource(in);
//	    return db.parse(is);
//	} catch (ParserConfigurationException x) {
//	    throw new Error(x);
//	}
//    }
//
//    static void importProperties(Properties props, Element propertiesElement) {
//        NodeList entries = propertiesElement.getChildNodes();
//        int numEntries = entries.getLength();
//        int start = numEntries > 0 && 
//            entries.item(0).getNodeName().equals("comment") ? 1 : 0;
//        for (int i=start; i<numEntries; i++) {
//            Element entry = (Element)entries.item(i);
//            if (entry.hasAttribute("key")) {
//                Node n = entry.getFirstChild();
//                String val = (n == null) ? "" : n.getNodeValue();
//                props.setProperty(entry.getAttribute("key"), val);
//            }
//        }
//    }
//
//    static void save(Properties props, OutputStream os, String comment, 
//                     String encoding) 
//        throws IOException
//    {
//        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
//        DocumentBuilder db = null;
//        try {
//            db = dbf.newDocumentBuilder();
//        } catch (ParserConfigurationException pce) {
//            assert(false);
//        }
//        Document doc = db.newDocument();
//        Element properties =  (Element)
//            doc.appendChild(doc.createElement("properties"));
//
//        if (comment != null) {
//            Element comments = (Element)properties.appendChild(
//                doc.createElement("comment"));
//            comments.appendChild(doc.createTextNode(comment));
//        }
//
//        Set keys = props.keySet();
//        Iterator i = keys.iterator();
//        while(i.hasNext()) {
//            String key = (String)i.next();
//            Element entry = (Element)properties.appendChild(
//                doc.createElement("entry"));
//            entry.setAttribute("key", key);
//            entry.appendChild(doc.createTextNode(props.getProperty(key)));
//        }
//        emitDocument(doc, os, encoding);
//    }
//
//    static void emitDocument(Document doc, OutputStream os, String encoding)
//        throws IOException
//    {
//        TransformerFactory tf = TransformerFactory.newInstance();
//        Transformer t = null;
//        try {
//            t = tf.newTransformer();
//            t.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, PROPS_DTD_URI);
//            t.setOutputProperty(OutputKeys.INDENT, "yes");
//            t.setOutputProperty(OutputKeys.METHOD, "xml");
//            t.setOutputProperty(OutputKeys.ENCODING, encoding);
//        } catch (TransformerConfigurationException tce) {
//            assert(false);
//        }
//        DOMSource doms = new DOMSource(doc);
//        StreamResult sr = new StreamResult(os);
//        try {
//            t.transform(doms, sr);
//        } catch (TransformerException te) {
//            IOException ioe = new IOException();
//            ioe.initCause(te);
//            throw ioe;
//        }
//    }
//
//    private static class Resolver implements EntityResolver {
//        public InputSource resolveEntity(String pid, String sid)
//            throws SAXException
//        {
//            if (sid.equals(PROPS_DTD_URI)) {
//                InputSource is;
//                is = new InputSource(new StringReader(PROPS_DTD));
//                is.setSystemId(PROPS_DTD_URI);
//                return is;
//            }
//            throw new SAXException("Invalid system identifier: " + sid);
//        }
//    }
//
//    private static class EH implements ErrorHandler {
//        public void error(SAXParseException x) throws SAXException {
//            throw x;
//        }
//        public void fatalError(SAXParseException x) throws SAXException {
//            throw x;
//        }
//        public void warning(SAXParseException x) throws SAXException {
//            throw x;
//        }
//    }
//
//}
